Jon Hamm attended the London press junket Tuesday for Good Omens, a six-episode Amazon adaptation of Neil Gaiman and Terry Pratchett?s 1990 novel of the same name, about a middle manager-esque angel and demon teaming up to try to prevent the apocalypse. In the show, Hamm plays a kind-of smarmy dickhead version of the Archangel Gabriel. He?s the kind of personality who makes being friends with a celebrity seem both worthwhile and attainable.